AvastSoftwareUpdater User and unable to login to Windows

Hi Guys,

I have a Windows7 Home Premium edition and I have free version of Avast installed.

Laptop was running fine till morning, but now when I turned it on, I cant see any of my windows users, it is showing only one user “AvastSoftwareUpdater” and asking for password to login.

I have no idea how this all happened, I just want to get back my laptop up and running with my data.

Appreciate your quick help.
(PS this message is posted from my work laptop, which also has Avast Free version, lets hope this one doesnt come up with same issue)

Regards